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https://new.osteriadelpane.com

Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
88
GRADE
B
FIX
1
REVIEW
10
PASS
12
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
94
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.45 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.75 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

6.15 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.75 s

Page Load Progression

584 ms
1.2 s
1.8 s
2.3 s
2.9 s
3.5 s
4.1 s
4.7 s
Checks
25
12 PASS 10 REVIEW 1 FIX
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Page Weight Budget
1.4 MB transferred, 26 requests
REVIEW
1.4 MB transferred, 26 requests
Info::
Page weighs 1.4 MB (1.4 MB transferred)
Info::
Fonts are 307 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 307 KB
Info::
26 HTTP requests
Info::
Estimated 0.30 g CO2 per page load
1.4 MB / 2.4 MB budget
1.4 MB transferred
26 requests
0.30 g CO2 per page load
Images 786.7 KiB 53%
Fonts 307.3 KiB 21%
JavaScript 231.0 KiB 16%
CSS 116.4 KiB 8%
Other 15.2 KiB 1%
HTML 14.1 KiB 1%
Other 1.5 KiB 0%
Other 743 B 0%
0 2.4 MB 4.9 MB
Under budget

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

B
Image Optimization
10 images, 0 KB saveable
REVIEW
10 images, 0 KB saveable
Info::
All images are well-optimized
10 images 787 KB
0 oversized -0 KB
10 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
753ms total JS execution
REVIEW
753ms total JS execution
Warning::
https://new.osteriadelpane.com/: 386ms CPU time
Warning::
Unattributable: 297ms CPU time
Info::
https://new.osteriadelpane.com/js/site/random: 70ms CPU time

Main Thread Breakdown

Other 50% Style & Layout 26% Script Evaluation 10% Rendering 9% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://new.osteriadelpane.com/386ms7ms2ms1st
Unattributable297ms6ms0ms1st
https://new.osteriadelpane.com/js/site/random70ms29ms9ms1st
C
JS Bundles
Action
5 scripts, 84 KB unused
REVIEW
5 scripts, 84 KB unused
Warning::
https://new.osteriadelpane.com/js/site/random: 58 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://new.osteriadelpane.com/js/site/random: unminified — 71 KB could be saved
Warning::
https://new.osteriadelpane.com/js/shared/random: 26 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://new.osteriadelpane.com/js/shared/random: unminified — 35 KB could be saved
Info::
Total unused JavaScript: 84 KB
84 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://new.osteriadelpane.com/js/site/random116 KB58 KB (50%)✗1st
https://new.osteriadelpane.com/js/shared/random58 KB26 KB (46%)✗1st
https://new.osteriadelpane.com/js/polyfill.min.js4 KB—✓1st
https://new.osteriadelpane.com/js/icons-data/random46 KB—✓1st
https://new.osteriadelpane.com/js/icons/random7 KB—✗1st

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
B
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
REVIEW
Main response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
C
Page Weight Inventory
Action
26 resources · 1.4 MB · 84 KB savings available
REVIEW
26 resources · 1.4 MB · 84 KB savings available
Warning::
Page weight 1.4 MB exceeds 1 MB target by 449 KB
Got: 1.4 MB Expected: ≤ 1 MB
Info::
~84 KB of savings available
26 resources · 1.4 MiB · 0 third-party 449.0 KiB over 1MB target
Image 54% · 801.9 KiB
Font 21% · 307.3 KiB
JavaScript 16% · 231.0 KiB
CSS 8% · 116.4 KiB
Document 1% · 14.1 KiB
Other 0% · 2.2 KiB

~84.3 KiB of savings available

Remove unused JavaScript: 84.3 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
3 fonts (307 KB)
PASS
3 fonts (307 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

307 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.5 s LCP 1.8 shttps://new.osteriadelpane.com/fonts/Inter-ExtraBold.woff2Inter-ExtraBold.woff2 https://new.osteriadelpane.com/fonts/Inter-ExtraBold.woff2 — 105.2 KiB — 1.4 s — font-display: swaphttps://new.osteriadelpane.com/fonts/Inter-Regular.woff2Inter-Regular.woff2 https://new.osteriadelpane.com/fonts/Inter-Regular.woff2 — 97.1 KiB — 738 ms — font-display: swaphttps://new.osteriadelpane.com/fonts/Inter-SemiBold.woff2Inter-SemiBold.woff2 https://new.osteriadelpane.com/fonts/Inter-SemiBold.woff2 — 105.0 KiB — 1.4 s — font-display: swap
Inter-ExtraBold.woff2 woff2 swap
Size 105 KB
Load time 1.4 s
Start 578 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Inter-Regular.woff2 woff2 swap
Size 97 KB
Load time 738 ms
Start 578 ms
Risk FOUT — text flashes from fallback to web font
Inter-SemiBold.woff2 woff2 swap
Size 105 KB
Load time 1.4 s
Start 578 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)

Fixing the unchecked items could save ~105 KB and ~210 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Warning::
Compressed response missing `Vary` header
The page is served with `Content-Encoding: gzip` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
JavaScript Blocking
No render-blocking JS or document.write usage detected
PASS
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Network Waterfall
26 requests over 2419ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.5 s LCP 1.8 shttps://new.osteriadelpane.com// https://new.osteriadelpane.com/ — 200 — 14.1 KiB — 269 ms — h2https://new.osteriadelpane.com/fonts/inter.css/fonts/inter.css https://new.osteriadelpane.com/fonts/inter.css — 200 — 2.7 KiB — 57 ms — h2https://new.osteriadelpane.com/css/shared/random/css/shared/random https://new.osteriadelpane.com/css/shared/random — 200 — 49.1 KiB — 209 ms — h2https://new.osteriadelpane.com/css/site/random/css/site/random https://new.osteriadelpane.com/css/site/random — 200 — 64.6 KiB — 225 ms — h2https://new.osteriadelpane.com/img/logo_color.svg/img/logo_color.svg https://new.osteriadelpane.com/img/logo_color.svg — 200 — 17.2 KiB — 225 ms — h2https://new.osteriadelpane.com/img/logo_white.svg/img/logo_white.svg https://new.osteriadelpane.com/img/logo_white.svg — 200 — 17.2 KiB — 225 ms — h2https://new.osteriadelpane.com/img/favicon/manifest.json/img/favicon/manifest.json https://new.osteriadelpane.com/img/favicon/manifest.json — 200 — 1.5 KiB — 131 ms — h2https://new.osteriadelpane.com/js/polyfill.min.js/js/polyfill.min.js https://new.osteriadelpane.com/js/polyfill.min.js — 200 — 4.4 KiB — 69 ms — h2https://new.osteriadelpane.com/js/icons-data/random/js/icons-data/random https://new.osteriadelpane.com/js/icons-data/random — 200 — 45.6 KiB — 108 ms — h2https://new.osteriadelpane.com/js/icons/random/js/icons/random https://new.osteriadelpane.com/js/icons/random — 200 — 6.8 KiB — 140 ms — h2https://new.osteriadelpane.com/js/shared/random/js/shared/random https://new.osteriadelpane.com/js/shared/random — 200 — 58.0 KiB — 866 ms — h2https://new.osteriadelpane.com/js/site/random/js/site/random https://new.osteriadelpane.com/js/site/random — 200 — 116.2 KiB — 953 ms — h2https://new.osteriadelpane.com/img/slider/001.jpg/img/slider/001.jpg https://new.osteriadelpane.com/img/slider/001.jpg — 200 — 75.9 KiB — 1.0 s — h2https://new.osteriadelpane.com/img/slider/002.jpg/img/slider/002.jpg https://new.osteriadelpane.com/img/slider/002.jpg — 200 — 67.1 KiB — 1.1 s — h2https://new.osteriadelpane.com/img/slider/003.jpg/img/slider/003.jpg https://new.osteriadelpane.com/img/slider/003.jpg — 200 — 84.9 KiB — 1.1 s — h2https://new.osteriadelpane.com/img/slider/004.jpg/img/slider/004.jpg https://new.osteriadelpane.com/img/slider/004.jpg — 200 — 80.5 KiB — 1.2 s — h2https://new.osteriadelpane.com/img/slider/005.jpg/img/slider/005.jpg https://new.osteriadelpane.com/img/slider/005.jpg — 200 — 101.3 KiB — 1.5 s — h2https://new.osteriadelpane.com/img/slider/006.jpg/img/slider/006.jpg https://new.osteriadelpane.com/img/slider/006.jpg — 200 — 75.4 KiB — 1.4 s — h2https://new.osteriadelpane.com/img/slider/007.jpg/img/slider/007.jpg https://new.osteriadelpane.com/img/slider/007.jpg — 200 — 131.2 KiB — 1.7 s — h2https://new.osteriadelpane.com/img/map.jpg/img/map.jpg https://new.osteriadelpane.com/img/map.jpg — 200 — 136.0 KiB — 1.8 s — h2https://new.osteriadelpane.com/fonts/Inter-ExtraBold.woff2/fonts/Inter-ExtraBold.woff2 https://new.osteriadelpane.com/fonts/Inter-ExtraBold.woff2 — 200 — 105.2 KiB — 1.4 s — h2https://new.osteriadelpane.com/fonts/Inter-Regular.woff2/fonts/Inter-Regular.woff2 https://new.osteriadelpane.com/fonts/Inter-Regular.woff2 — 200 — 97.1 KiB — 738 ms — h2https://new.osteriadelpane.com/fonts/Inter-SemiBold.woff2/fonts/Inter-SemiBold.woff2 https://new.osteriadelpane.com/fonts/Inter-SemiBold.woff2 — 200 — 105.0 KiB — 1.4 s — h2https://new.osteriadelpane.com/api/popups/api/popups https://new.osteriadelpane.com/api/popups — 200 — 743 B — 832 ms — h2https://new.osteriadelpane.com/img/favicon/favicon-32x32.png/img/favicon/favicon-32x32.png https://new.osteriadelpane.com/img/favicon/favicon-32x32.png — 200 — 2.6 KiB — 50 ms — h2https://new.osteriadelpane.com/img/favicon/android-icon-144x144.png/img/favicon/android-icon-144x144.p... https://new.osteriadelpane.com/img/favicon/android-icon-144x144.png — 200 — 12.6 KiB — 61 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
2 images, 33 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

2

Total Size

33 KB

2 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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